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report true clock resolution based on the frequency information 

from the underlying counter in clock_getres(). For frequencies
above 1GHz report a resolution if 1 nsec.
This commit is contained in:
kardel 2006-07-08 12:10:33 +00:00
parent d61e05c75e
commit d788cc37f6
1 changed files with 9 additions and 2 deletions
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11
sys/kern/kern_time.c
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@ -1,4 +1,4 @@
/* $NetBSD: kern_time.c,v 1.101 2006/06/07 22:33:40 kardel Exp $ */
/* $NetBSD: kern_time.c,v 1.102 2006/07/08 12:10:33 kardel Exp $ */
/*-
* Copyright (c) 2000, 2004, 2005 The NetBSD Foundation, Inc.
@ -68,7 +68,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: kern_time.c,v 1.101 2006/06/07 22:33:40 kardel Exp $");
__KERNEL_RCSID(0, "$NetBSD: kern_time.c,v 1.102 2006/07/08 12:10:33 kardel Exp $");
#include "fs_nfs.h"
#include "opt_nfs.h"
@ -299,7 +299,14 @@ sys_clock_getres(struct lwp *l, void *v, register_t *retval)
case CLOCK_REALTIME:
case CLOCK_MONOTONIC:
ts.tv_sec = 0;
#ifdef __HAVE_TIMECOUNTER
if (tc_getfrequency() > 1000000000)
ts.tv_nsec = 1;
else
ts.tv_nsec = 1000000000 / tc_getfrequency();
#else /* !__HAVE_TIMECOUNTER */
ts.tv_nsec = 1000000000 / hz;
#endif /* !__HAVE_TIMECOUNTER */
break;
default:
return (EINVAL);